They are members of an increasingly exclusive club — a district attorney and a mayor from southern California, a legislator from Minnesota, a handful of others scattered across the country. They are elected officials who are Republican and openly gay. "People think it's an oxymoron," said the Minnesota state senator, Paul Koering. "How can you be gay and be in the Republican Party?" Never more than a tiny fraction of GOP politicians, openly gay Republicans are about to disappear from Congress with the retirement of Rep. Jim Kolbe (news, bio, voting record) of Arizona, and Koering is the lone openly...